Ventilator



A rii 29, 1924.

J. A. OLSSON VENTILATOR Filed June '5 1920 2 Sheets-SheeLgl I/ 5 TD 4.6%

VVL f7- TUE/V595 Patented Apr. 29, 1924.

T E S JOHN A. oLssoN, or ATLANTI 'MAssAoHUsE'rTs.

VENTILATOR.

Application filed June 5,

To all whom it may concern.

Be it known that 1, JOHN A. OLssoN, of Atlantic, in the county of Norfolk and State of Massachusetts, a citizen of the United States, have invented a new and useful Improvement in Ventilators, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part of this specification, in explaining its nature.

The present invention relates to an improvement in ventilators and one essentially of that type having a rotary head or cowl.

The invention essentially pertains to the 4' manner in which the passage or opening through the body of the ventilatoris controlled with the object of obtaining economy in construction, increased wearing properties, facility of operation and efficiency in point of control.

The invention can best be seen and understood by reference to the drawings in which-- Figure 1 is a vertical section of the ventilator with the damper controlling the passage through it occupying a closed position.

Fig. 2 is a vertical section of the body of the ventilator with the damper occupying an open position.

Fig. 3 is a section on the line 33 of Fig. 1' excepting thatthe damper is occupying an open position.

*ig. 4: is a section on the line 44:'of Fig. 1, and Fig. 5 is a section on the line 5-5 of Fig. 1.

Referring to the drawings I 1 represents the body of the ventilator generally cylindrical in form and attach able to any suitable base of support (not shown). 7

2 represents the rotary head or cowl of the ventilator which has an opening in the side and is provided with a vane or wing 3 and a counterbalancing weight 3 for controlling its movement in the usual manner.

The head overlaps the body of the ventilator at the top and is mounted to rotate relatively to the body in the following manner: Centrally located within the body of the ventilator is a post or upright 4. This post is fixed to the body by sets of braces 5 and 6, respectively, preferably disposed adjacent the upper and lower ends of the body. The upper brace 5 consists of a series of radial arms 7 connected at their 1920. Serial No. 386,734.

outer ends to the interior wall of the body and at their inner ends with a ring 7 which tightly embraces the post 4. At the bottom the brace 6 likewise consists of radially-extending arms 8 connecting at their outer ends with the interior wall of the body of the ventilator and at their inner ends with a ring 8. provided with a shoulder 10 which bears against the top side'of the ring, 8. Beyond the shoulder the post is provided with an extension 11 of reduced diameter which extends through the ring 8 and below the same. Threaded upon the end of the extension 11, thus projecting, is a nutylQ which when tightened bears against the under side of the ring and thereby fixes the post to the ring against endwise displace. ment. The post 4. thus fixed to the body of .the ventilator extendspupwardly into the head and occupies a central or axial position with rela-tionto the head. The head is mounted to rotateon the post 4 as follows: Fixed to the interior wall-13 ofthe head is a cleat 14. provided with a downwardly-projecting annular flange 15 which lies above the top end of the post and inalignment with it. Threaded into the end, of this flange in extension thereof is a sleeve 16 whichextends downwardly and looselyembraces the post. Thesleeve is otherwise held securely in place by means of braces consisting ofradial arms 16' connecting with the interior side wall of the head or cowl. The sleeve extends for some considerable distance over the post preferably to a point not far removed from theubottom of the head iniorder that the sleeve may provide a long lateral bearing for the post. Fixed within'the sleeve at the top endther'eof, preferably by a threaded connec'tion, in line with the top end surface 17 of the post is a plug fixture 18. Between the top end 17 of the post and the fixture 18 is arranged a friction bearing consisting of a single ball 19'on which the head turns rela tively to the post and body of the ventilator. Atits lower 'endthe sleeve 16 is provided with an out-turned annular flange 20. Fixed to the post below the bottom end thereof are keepers 21 in the nature of hooks which extend upwardly around the flange and act to hold the head onto its bearing by preventing lifting or endwise displacement thereof.

The opening or passage through the ven- The lower end of the post is tilator is controlled by a damper 22 located in the body. The damper is mounted to.

turn upon a crossrod 23 which extends through the post and through the opposite side walls of the body, the ends of the rod being headed against the exterior face of the body for fixing the rod in place. For

mounting the damper to turnupon the crossto'occupy its open position. In this con nection' it will be observed that the offsets project in opposite directions from the opposite sides of the" damper corresponding as one side turns upwardly to fold against the post above its axis and the other turns downwardly to fold' against the post below its axis. The damper is also sufiiciently cut away at the centre between the inner ends of the offsets 25 as will enable the damper to turn freely without interference with the post, such incision, however, being so little as toleave an inappreciable opening when the damper is closed.

The damper is normally maintained to occupy an open position by means of an overbalance or weight 26 on one side thereof and is drawn to a closed position by means of a chain 27 fixed to the opposite side thereof, a stop 28 defining the closed position of thedamper.

Having thus fully described my invention, I claim and desire to secure by Letters Patent of the United States 1.- In a ventilator of the type specified having a rotary head and a body with .opening therethrough, a post centrally disposed within the body for supporting said rotary head, means for fixing the post to the body, a damper-Within the body for controlling the opening therethrough, means for mounting the damper to turn within the body and assume therein a closed position substantially at right cngles to the post or an open position substantially in the plane of the post, said damper being provided on opposite sides thereof with offsets which fit around the post when the damper is occupying its open position as aforesaid, and means for controlling the damper.

:2. In a ventilator of the type specified having a rotary head and a body with opening therethrough, a post centrally disposed within the body for supporting said rotary head, means for fixing the post to the body, a damper within the body for controlling theopening therethrough, a rod extending through said post providing a mounting for the damper, said damper being provided with offsets on opposite sides thereof oppositely arranged whereby the damper may lie substantially in the plane of said post and the offsets thereof fit around the post when the damper is occupying its open position, and means for controlling the damper.

8. In a ventilator of the type specified having a rotary head and a body with opening therethrough, a post centrally disposed within the body for supporting said rotary head, means for fixing the post to the body, a damper within the body for controlling the opening therethrough, a rod on which said damper is mounted to turn, said rod extending crosswise said body and through said post with the ends of the rod fixed to the opposite side walls of said body, means for mounting the damper to turn on said rod, said damper being incised at the centre and provided on opposite sides thereof with offsets oppositely disposed whereby the damper may assume substantially a position in the plane of said post, the offsets thereof fitting around the post when the damper is in its open position, and means for controlling the damper. v

4:. Ina ventilator of the type specified having a rotary head and a body with open.-

ing therethrough, a post centrally disposed within the body for supporting said rotary head, means for'fixingthe post to the body, a damper located in the body for controlling the opening therethrough, means for mounting the damper to turn within the body and assume therein either a closed or an open position, said damper being provided with ofisets on opposite sides thereof oppositely arranged with an incision between said oifsets whereby the damper may turn freely with relation tosaid post and lie when open substantially in the plane of said post, means for overweighting the damper to occupy normally a closed position, and means for o ening the damper.

. J HN A. oLssou 

